Preventive Maintenance Procedures Flashcards
7 cards from real CAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Preventive Maintenance Procedures flashcards as text
What is the minimum recommended frequency for cleaning smoke detector chambers in environments with high dust or airborne particulates?
Answer: Semiannually or per manufacturer recommendations based on environment
High-contamination environments require more frequent cleaning; manufacturer guidelines and environmental conditions should dictate scheduling.
During PM, a heat detector is found to have surface corrosion on its fusible element. What action is required?
Answer: Replace the heat detector
Corrosion on a fusible element alters its rated response temperature, so the device must be replaced to maintain system integrity.
A technician notices that an addressable smoke detector's address is set to 00 during PM. This means:
Answer: The detector has not been addressed and will not be recognized by the panel correctly
Address 00 (or an unset address) means the device cannot be uniquely identified by the control panel, causing supervisory or communication faults.
What is the purpose of inspecting conduit seals and entry points into alarm control panels during PM?
Answer: To prevent moisture and pest intrusion that can cause corrosion or shorts
Unsealed conduit entries allow moisture and insects into enclosures, leading to corrosion, shorts, and unreliable operation.
Which NFPA standard specifically governs the inspection, testing, and maintenance of fire alarm systems in the United States?
Answer: NFPA 72
NFPA 72, the National Fire Alarm and Signaling Code, establishes all requirements for fire alarm ITM activities.
When verifying speaker/strobe devices during PM, what measurement confirms the strobe meets ADA candela requirements?
Answer: Candela output verified against the device's listed rating using a photometer or per installed documentation
Listed candela output must be confirmed against ADA/NFPA 72 requirements, typically verified by device listing since field photometer use is rare.
A panel displays a 'supervisory' condition on a sprinkler tamper switch zone during a PM visit. What does this indicate?
Answer: A sprinkler control valve may be closed or partially closed
A sprinkler tamper switch triggers a supervisory signal when a control valve is moved from its normal open position.